As reported previously, Harry Potter film producer David Heyman made an appearance at an Apple store in Los Angeles. Later SS was able to get a few minutes with Mr. Heyman who passed on some nuggets about the upcoming Harry Potter and the Deathly Hallows films. As heard in this audio recording here on youtube, Mr Heyman confirmed the return of Imelda Staunton as Umbridge. He also told them about the introduction of Bill Weasley (Domhnall Gleeson) saying “Well, we know it’s his wedding. So, he’s introduced at his wedding and
we express it’s Bill and Fleur’s wedding so you know it’s Bill Weasley
and it’s at the Weasley house. So you know pretty much who he is when
you see him and Fleur. It’s pretty clear in the end.”

Earlier TLC first reported young Dumbledore has been cast and will be portrayed by Toby Regbo. In the interview David Heyman confirmed the part would be in the film, saying:
“We have Hermione reading parts of the book and we also have a character
at the wedding who talks about Dumbledore’s past. There’s Elphias Doge,
who also has a more favorable opinion of Dumbledore. Hermione finds
Rita Skeeter’s book and she reads the book to them. SS: Is there going to be an actor playing young Dumbledore? Heyman: Yes.”